To fedders manufactur



J. -M. FEDDERS.

RADIATOR CORE. APPLICATION FILED sumzo. 1915,

Patented Jan. 6, 1920.

2 SHEETSSHEET l- UNITED STATES PATENT JOHN M. rnnnnns, orBUFrALo, new YORK, ASSIGIN'OR T0 irnnnnns MANUFACTUR- ING COMPANY, 11m, or BUFFALO, NEW "roan, A CORPORATION or NEW YORK.

RADIATOR-CORE.

Specification of Letters Patent.

Patented Jan. 6, 1920.

Application filed September 20, 1915. Serial No. 51,548.

To all whom it may concern:

Be it known that I, JOHN M. Fnonnns, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Radiator-Cores, of which the following is a specification.

This invention relates to the cores'of cellular radiators which are more particularly used for cooling the water of gas engines and in which the walls of the water tubes and the radiating fins between said walls are constructed of corrugated strips of sheet metal.

It is the object of this invention to provide a core for radiators of this character with simple, efiicient and superior means for holding the several strips of a core In their proper assembled position relatively to each other preparatory to permanently connecting the same by soldering.

In the acompanying drawings: Figure 11s a fragmentary front elevatlon, partlyin section, of a radiator core constructed in accordance with my invention. Fig. 2 1s a fragmentary perspective view of one of the strips or sections of the radiator form ng one wall of a water tube. Fig. 3 1s a slmllar view of one of the strips forming one of the radiating fins. Fig. 4 is a horizontal section taken on line 4- 1, Fig. 1. Fig. 5 1s a vertical section taken on line 5-5, Fig. 1, and looking toward the left. Fig. 6 1s a similar View taken on the same line but looking toward the right. Fig. 7 1s a fragmentary sectional elevation of a radiator core embodying my improvements but showing one radiating fin between ad acent water tubes. Fig. 8 is a similar vlew showing three radiating fins between ad acent water tubes.

Similar characters of reference indicate corresponding parts throughout the several views.

In its general organization my improved radiator comprises a plurality of water tubes 1 which are of zig-zag or serpentine form and a plurality of air tubes 2 which are arranged at right angles to the water tubes and operate to conduct the a1r past the exterior of the water tubes for the purpose of cooling or changing the temperature of the water or other liquid which 1s passing through the tubes 1. As shown in the drawings the water tubes are arranged vertically and the air tubes horizontally, but any other arrangement of these conduits may be employed, if desired. In the completed radiator the upper and lower ends of the water tubes are connected with upper and lower water headers or boxes in the usual and well known manner.

The several water tubes and air tubes are constructed of a plurality of corrugated strips of metal which are so assembled that two or more vertical rows or tiers of air tubes are formed between two adjacent water tubes, two of such strips 4: being em ployed to form the walls of each water tube and one or more additional strips 5 being used to form one or more radiating fins or webs between the opposing walls of two water tubes to produce therewith two or more tiers of air tubes. In the preferred example shown in Figs. 1 and 4C of the drawings three tiers of air tubes are formed between every two adjacent water tubes but this number may be varied as desired.

Each of the'walls of the water tube and each of the radiating fins forming part of a tier of air tubes is constructed of a single strip of metal, preferably copper or an alloy thereof and so shaped that the same is provided with a longitudinal row of transverse corrugations 6 giving the strip a zigzag form in the direction of its length. The summits 7 of the corrugations on one side of each water tube strip extend uniformly or continuously from one longitudinal edge thereof to its other longitudinal edge while the summits of the corrugations on the opposite side of each of these strips have a receding central part 8 and laterally offset end portions 9, 9 at the opposite longitudinal edges of the strip. The continuous summits of the corrugations on one side of the strip and the ofi-set portions of the summits on the opposite side of the corrugations of each water tube strip are preferably flattened so that they are parallel with the length of the stripas a whole, as shown in Figs. 1, 2 and 5. i

In forming each water tube the strips constituting the walls thereof are assembled so that the convex sides of the end portions of the summits of one of these wall strips engage with the concave sides of the off-set portions of the summits of the other companion strip of the respective water tube, thereby causing the longitudinal edges of the two wall strips to engage with each other throughout their length while the intermediate parts of these wall strips are separated and thereby form a conduit for the passage of the water through the same. The connection between the opposite longitudinal edges, of the wall strips of the tubes is effected by soldering the same in the usual and well known manner.

Each radiating strip is so formed that the summits 10 of its corrugations are continuous from edge to edge of the strip and preferably flattened in the same manner as the strips forming the water tube walls,

The strips constituting the radiating fins or webs between adjacent water tubes and forming the air tubes in connection with the opposing walls ofthe water tubes may be assembled in various ways. As shown in Figs. 1 and 4, each pair of radiating fins between adjacent water tubes is assembled so that each of these fin strips engages the convex sides of its summits on one side of the corrugations thereof with the continuous summits of the corrugations of the adjacent tube strip, while the continuous summits of the corrugations of said fin on the opposite sides thereof engage with the continuous summits of the corrugations of the companion fin strip. These fin strips are also connected with each other and with the water tube strips by means of soldering as commonly, practised in the manufacture of radiator cores.

In order to facilitate assembling of the fin strips with each other and with the water tube wall strips and retaining these members in this position until they are soldered or otherwise secured together a plurality of centering loops 'll'areprovided on each fin strip and adapted to interlock with the adjacent wall or fin member. As shown in the drawings-each fin strip has a plurality of rows of centering loops formed thereon so that a "pair of the same project laterally from alternate concave faces of said corrugations and the loops of a row on one side of the strip alternating with and also staggered relatively to the loops in a rgw on the opposite side of the respective str1p, as shownin Figs. 3 and 6.

In the assembled position of the wall strip and fin strips the centering loops on the fin strip engage withthe concave faces of an adjacent strip, for instance, in the case of the construction shown in the drawings the centering loops on one side of each fin strip engage with the concave faces of the adjacent wall strip and the centering loops on the opposite side. of the respective fin strip engage with the concave faces of the companion fin strip. By this means the several wall and fin strips may be quickly as sembled and held in their proper relative position until they are permanently connected. Each of the centering loops is of substantially the same form in cross section as the cross section of the corrugations of the wall strips and fin strips so that these loops engage fully with the concave faces on the adjacent strip and do not obstruct the air passage through the same, thereby permitting easy repairing of a core by a soldering iron instead of by a torch in case a leak occurs. Bv staggering the centering loops on one side of each fin strip relative to those on the opposite side thereof it is possible to make all the fin strips alike from the same dies and still permit of assembling them without interference of the centering loops on one fin strip with those of another fin strip.

For the purpose of preventing the e11- trance of water from the headers into the endmost air tubes of the several tiers each tube strip is connected at its opposite ends with the corresponding ends of the proximate fin strip by a locking joint 12, as shown at the upper end of Fig. l, or by any other suitable means.

Instead of using two radiating fins between adjacent water tubes a greater number of fins may be employed, for instance, as shown in Fig. 8, three radiating fins are employed in each unit or set the outer members of which engage with the wall strips of the respective tubes while the intermediate fin strip engages on its opposite sides with the outer fin strips. If desired only a single fin strip need be employed, as shown in Fig. 7, in which case this single fin strip engages on its opposite sides with the opposing walls of two adjacent water tube walls.

I claim as my invention:

1. A radiator core comprising a plurality of water tubes and a plurality of radiating fins arranged between the several water tubes, each of said tubes having two walls each of which is constructed of a corrugated strip of metal and each of said fins being constructed of a single corrugated strip of metal, and each of said fin strips having the concave faces of its alternate corrugations provided with laterally projecting rows of centering loops which are of substantially the same form in cross section as the corrugations of the water tube and fin strips and which engage with the concave faces of the corrugations of adjacent strips, and the loops in each row of each fin projecting alternately from opposite sides of the respective strip.

2. A radiator core comprising a plurality of water tubes and a plurality of radiating fins arranged between the several water tubes, each of said tubes having two walls each of which is constructed of a corrugated strip of metal and each of said fins being constructed of a single corrugated strip of metal, and each of said fin strips having the concave faces of its alternate corrugations provided With laterally projecting rows of centering loops Which are of substantially the same form in cross section as the corrugations of the Water tube and fin strips and which engage with the concave faces of the corrugations of adjacent strips, and the loops in each row of each fin projecting alternately from opposite sides of the respective strip and the 10 centering loops on one side of each strip being staggered relatively to the centering loops on the opposite side thereof.

JOHN M. FEDDERS. 

